Improved process of forging carriage-shackles



UNITED. STATES PATENT OFFICE.

FRANCIS E. MORSE, OF PLAN'rsvlLLE, CONNECTICUT.

IMPROVVED PROCESS OF FORGING CARRIAGE-SHACKLEIS.y

Specification forming part of Letters Patent No. 106,190., dated August 9, 1870.

'o all `whom it may concern:A

Be itknown that I, FRANCIS B. MORSE, of

rPlantsville, in the county ot' Hartford and ,State of Connecticut, have invented a new Improvement in Processes for Forging Carriage- Shackles; and I do hereby declare the following, when taken in connection with the accompan ying drawings and the letters ot reference marked thereon, to'be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represem, in-

Figure l, a perspective view of one of the ears; Fig. 2, a perspective view of the base; and in Fig. 3 the manner of securing the ears to the base preparatory to welding.

This invention relates to an improvement in the process of forging carriage-shackles.

Various devices have been conceived for constructing a shackle so as to present a'square corner upon the outside and a curved or braced corner upon the. inside, the most successful of which have been by forging the shackle from a solid piece, or by welding a piece across the base in the form of a T, then bending up the ear-s. The first necessitates the use of a large" piece ot' metal at that part where the ears are formed, while the remaining portions are slight. The difficulty of this process consists in the fact that heatin g the large mass to a sufficient degree of heat is liable to burn the lighter portions, and to the last-,named process bending the ears strains and weakens the material.

By my invention these difficulties are entirely overcome; and it consists in forming the ears so as to be temporarily set on or attached to each side of a base and held in that position until the whole can be heated, and then, by suitable dies, welded.

A is one ear, the two for each shackle being substantially alike. Upon the lower edge I form a groove, B, with a slight lip, a and d, upon each side. C is the base, drawnout at the ends D and E to form the usual projections for attachment to the-axle and shaft. The groove B in the ear corresponds to the thickness of the base G, and the ears are each set onto'the base, as denoted at the right hand of Fig. 3; then placed in a suitable die. The lips a and d are struck so as to be embedded into the base,

as denoted at the left hand, Fig. 3, which secures the ears tothe base sufficiently stron g to hold them in position and be placed in the lire, and when heated the base, with the ears, is set into a suitable die, constructed for the purpose, which strikes and welds the ears solidly tothe base, producing a perfect square corner upon the outside and a rounded or braced corner u pon the inside, as seen in Fig. 4; andI produce a most perfect shackle ata greatly reduced eX- pense from the process heretofore employed.

I claim as my invention- The process hereinfdescribed for forging oarriage-shackles, consisting in constructing the several parts of the form substantially as described, and temporarily attaching the two ears to the base by inserting the ends of the base C in the grooves ofthe ears and then swaging the lips a d down into the base C, as shown, so as to be locked onto the base preparatory to welding, substantially as set forth.4

F. B. MORSE.

Witnesses:

JOHN H. SHUMWAY, A. J. TIBBETS. 

